Wall-plug.



the following is a specification.

".4512 and 24, which strips but attached ends, are drawn UNITED STAT-asPATENT QFFICE.

. FRANK'I.. DYKEMA, oF GRAND RAPIDS, MICHIGAN, AssIGN'oP., BY MESNEASSIGNMENTS, To MoNARcH MANUFACTURING COMPANY, or* AUGUSTA, MAINE, AconIonATIoN.

` wALr'frLUG.

No. 903,459. specification o Appunti@ mai November "1,.190'1. serai N0.misc'.

To dll whomit 'may concern:v

Be it known that I, FRANK citizen of the United4 States, residing atGrand .Ra ids, in the county of Kent, and

State 'of ichigan, have invented new and useful Improvements inWall-Plugs, of which .g Myinvention relates to wall plugs 4def signedfor insertion in concrete 401:' mason' walls andintended to receive andhold a nail driven thereinto, and its o'b'ect is to produce such a.device' in an especia ly cheap and ef- 'fective form. 'L A' In thedrawings Fi re 1 is a to plan view -of-thef'sheet metal b anklfrom vv cha preferred style of m pllug informed Upg: Flg. 2 ,is an edge view o --te same after forming and from the side, which is the lower fsidefinFig'L 1. taken online xfa of Fig.'1.:

shows a modified form of construction. The device can be made fromanysuitable material, lbut I prefer to use sheet metal, and by so doingI can forni tlie entire device from one piece if I wish, and stamp itintocoinplete shape with not more than two operations.

Fig'. 1 shows the blank. It is preferablv of rectan lar form. Puttin f'suitab e dies I cut notches in the sides, as at 19, 21, and sht'themetal on all the solid lines shown in this figure; that' is, byshortlongitudinal cuts at the rear (left) endvof dotted lines a c,by-'transverse cuts not extending to either edge, as at 1, 3, 5, 7, 9,11, 13an b short longitudinal cuts intersectin 9F13, as at 15 17. Then,preferab y by conl tinuance' of the same operation, I

lips 26 and 28 dow'nwaidupon the' folding lines f lq so that these lipsassumethe form shown in Fig'. 3. At the same time the alternate strips14, 16 18, 22, and-also if' desired, after the cutting,

have free sides p respectively up and ldown so that they takelongitudinally the form-indicated Figs. 4 ,and 5, and so that they take,transiversely of themselves, at their central portions the`formindicated-imFig. 3, In this Fig. 3V the dotted horizontallinerepresents.the'lower-edge of thelip 4,

`blank connecting L. Dirham, a'

Fig." 3V is a sectional 'view after.Ioi'Ining a secff tional view'ontlie line y--y,-an Fig. 5 is a this blank into the' en -sI turn the orthat part of the at their ends the strips- 14, 16, etc., and it isapparent that the strips i Letters 'Patent Patented Nov. 10, 1908.

in their central portion are forced one above 'this central line and thenext below such central line, -and are so tilted or inclined that theirrear edges are nearer to the central line than their forward 'edgesare.` believe preferabl by adistinct and subseuento eration, fold themetal upwardly on otted ines a'. b and-c, thus formmy upright (langes 2,4 and 6', land ,also'fold t e metal upwardly on dotted' ed, thus formingthe Vupwai'dlyieirteii'di rig 'connecting or spapin I l'ange. or' neck8, and also fold the 4meta downwardlyon thefoldingline e, thus formf inthe dependiri'g'guard'and guide-plate 10. Al the'parts tlie'rjihavetherelative positions ,B hvynin'FigsgQ 'andi i Ingthe forii1- own inFigfGI' make the dslplete 1Q.. 0'I`1.i 'Seperate Piece; lt. @up mism-1y .bein fw asethe cufwould be 'along lines like' the. solid lines `i ri "l*`ig. 6. 'j I' then'fasten the guideplatetothebod of the plug and at -aproxmil tely right/ang es thereto, by any suitable means, as, forexample, b foldin .thee'nds of flanges 4 and 6 over on the dotted lines23, 25 so .that they ei'iibiacc and hold tlie plate 1() when it issevered and put inapesition, the points of embracing and hol nigbeinvsliownby 27 and 29.

After my plug is formed as so far described, `I intend to coat' it with'paint, tar, or other preservative material, and if such material illsthe o enings between strips 14, 16, etc., o r parta y fillstlie same,and remains there, .it will do no harm, but will be of advantage inexcluding mortar or concrete.

5 .In the Vbuilding of a Wall this plug is inserted'at the desired spot.t'ar sets against the lexterior of strips A14, 16, etc., and' to s omeextent also upon the' other side of such strips. On account of the wayin which the mortar or concrete will thus ing edges of stri S14 16 countof "the inclihatidn foi f `creases,"the resistance increase.

' Thenfand I' The concrete or morenter and set within theoutWardly'extendshould 'be displaced from 'its posiion horizontal dottedine in Fig. 3. I If this interior space is filled with paint, tar,orsome similar material, this. will not impede the entry of the nail;and in any event, under practical conditions, the mortar or the concretewill not enter between the strips so completely 'as to interfere withthe driving of the nail. The device will be so constructed that eitherin its original form oiby the pressure exerted by the surroundinmaterial the strilps 14, 16, etc., will be c ose enough 'toget ier sothat the .nail on its entry must orce them to yield; and it will followthat the rear ed e of each strip will be forced a ainst the nai withconsiderable pressure. n account of. the inclination o-these strips, asshown in Fig. 3, the rear edges will thus yield when the nail isdii'vcii inwardl but when there is an outward-pull upon t le .nail theywill not only not yield, but will tend to 4grasp the nailmore firmly andthesharp edges left 3ov by thc ordinary process of cutting, will biteinto the sides of the nail in such a way that no ordinary straincan'pull it out.

When the nail is driven in so that the head of the nail strikes theguide-plate 10, such head will not pass through the opening there.- in,which should not be large enough to pormit such passage; 'but as thedriving process is continued, thc guidcplate l() will be beni back flatupon the neck 8 against the l'arc ol' oppositeor facing walls which maycollapse the wall, or will he held out at a predetermined distance Iromthe wall just according to the shape and resisting strength-of theflange or neck 8. V( )livionsly in the form shown iii the drawings, thebaseoi this flange or neck 8 will operate as a stop against. the face ofthe wall, and it could beso constructcd, as for example by'iniiking itof material which would not yield o r bend further under the ordinaryhammer stroke, that'it would 50 hold the head of the nail out awayfroiii .the

face of the wall 'at'tlic samedis-tance sh'wir in Fig. 3, or at anypredetermined distance.-

I have found that this wall plug is exceedingly cheap to inaiiufacturea`nd Vhaving no or yield toward each other and reduce the diameter orthickness 'of the device, it is there- .fore particularly eflicient; andI also find that its means of engaging the driven-nail constitute-afeature of distinct advantage. Itis evident also that the essentialfeature ofthe invention is to cause these transverse stri sto biteorbind against the nail sufficient y to revent its accidental removal, andthat by l 6 5 rawing these strips alternately up and down neet-ingflange 'orfnerti lane of the plate, as shown by the preferred orm of thedevice selected for illustration a materially better result is obtainedthan if 'a less number of strips were used Tand drawn in one directiononly;

Having thus described my inventionjwhat cure by Letters Patent, is-

meanswhei'e such plate may engage the ing to receive and guidet foruniting such guide-plate l 'to.. si 'ic plate to such iriainplate.Y 'Awall plugeoin and' a' plu ralily of .partial versc strips havingtheir-.ciu sui-lr )late and their, ceiit-iallpoitions.sepawhereby theentering nail ri'iay'ipslJ- such central poi'tions'fandf-berceived andand a plurality of'tr'ansversc strips having their end poitions attachedto the plate an f and mmovei part in one direction and part in the.opposite direction with relation to the the face of, the wall.

and a plumlity of .transverse resilient' strips .or in reversedirections 'witlirrespctt'b the- I claim to have invented, and desire tosej- 1. A wall lug comprisingainetal plate,l

' wall in which it is embedded, means whereby the nail maybe heldcentrally andlpii'gitiiin ain plate, which guide-plate 'hasjiinopem iepointlof the nail and to retain the head of the nail, andans theircentral lportions separate from the plate plane of said plate, wherebythe entering 'A etween the central ortions carried by the p atc forholding the device at' .6. A wall plug comprising a inetalplate 11.109[connected tp thereof whereby the 'entering nail, maybe gl'iliied,ionits'sildtliereby,f dlineanscaitf Vn'er y"t atefoi 5. A Wallplug'comprisiiig a metal plated:

having their end portions attached to the late and their vcentralportions separate rom the plate and part of the same drawn in onedirection and` part drawn in the opposite direction from the plane ofthe plate, whereby the entering nail may pass between the centralportions of 'the o positely drawn sti'i s, and means carried Ey theplate for hol the plug at the face of the wall.

7. A wall plug comprising a metal plate having a pligrahty Voftransverse partially severed strips integrally attached at their ends tothe late and at their central portions drawn in reverse directions awayfrom the plane of the plate, whereby the entering nail may pass betweenthe oppositely drawn 'stri s, and means carried by the plate for hol ingthe plug at the face of the wall.

8. 4A lug comprising a metal plate having a'plura ity of transversestrips, thv latter having portions attached to the plate and otherportions separated from the plate and at one side of the planetheroffthe rear edges of the strips being inclined closer to the plane sthe inc of the plate than the forward: edges of the strips, whereby therear edges yield to the entering nail but hold the said nail against 9.`A wall plug comprising a metal plate havin a plurality of transversestrips out of the p ane of sich plate, the strips havin their forwardedges inclined outwardly an away from the ane of the plate, wherebywhile the rear e ges of the strips yield to the entering nail, theforward cdgs engage with osing material and old the plate againstremoval. I

1,0.` A wall lug com rising a metal plate having partial y severe( andtransversely ex anded metal strips bent to incline inwardly rom thefront to the rear edges of such strips, whereby the rear edges of thestrips yield to the entering nail and hold the said nail againstremoval, while the front edges of the strps engage lwith the inclosingmaterial an hold the plate against removal.

11. A wall plug comprising a metal plate having a plurality oftransverse strips, the strips havin their ends attached to the plate andtheir central portions drawn away rom theplate partly in one directionand partly in the o ipsite direction, the strips being so incline( t attheir rear edves 4are least removed from the 'plane of the plate, whereby said rear edges of the-strips yield to the entering nail but hold thesaid nail against removal.

12. A wall plug comprising a metal plate having partially severe andtransversely expanded metal strips drawn respectively in oppositedirections from the plane of the plate and inclined rearwardly, the rearportion of each strip inclining toward the plane of the plate and theforward portion thereof inclining away from the plane of the platewhereby the rear portions of the strips yield to but hold the enteringnail respectively upon opposite sides thereof and the forward portionsof the strips engage with the surrounding material respectively uponoppo.

site sides of the plate and hold the plate 'against removal.

13.; A wall plug comprising a metal plate i and a'plurality of'partiallysevered transverse'strips having their ends connected to such plate, andtheir central portions separate from and outside the plane of the plate,whereby the entering nail may be received and gripped by the centralportions of said transverse strips, and meansvcarried'by the plate forreceivingv and guiding the nail to a central position.

14. A wall plug comprising a metal plate having a pluralityA oftransverse partially severed stri s inte ally attached at their ends tothe p ate an at`their central portions drawn respectively in reversedirections away from the plane ofthe plate, whereby the entering nai maypass between the oppositely drawn strips, and means carried the platefor receiving and guiding the nail to a central osition.

15. VA wa plug comprising a metal plate having partially severe( andtransversely exanded metal strips bent to incline inwardly igrom thefront tothe rear edges of such strips, whereby the rear edges of thestripsv yield to the'entering nail and hold the same against removal,the front edges of the strips bein `adapted to engage the inclosingmateria and hold the plate against removal, and means carried by theplate for receiving and guiding the nail to a central position.

In testimony whereof I have hereunto set Y my hand in presence of twosubscribing witnesses..

FRANK L. DYFEMA. Witnesses:

MARY S. Toolma, MARY SCHULTE.

